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The defense date of the thesis is 2013-08-15
The current date is 2019-04-19
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URN etd-0815113-090145 Statistics This thesis had been viewed 1278 times. Download 12 times. Author Jun-Hwa Chen Author's Email Address No Public. Department Communication Engineering Year 2012 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 43 Title Proximity-Coupled Stacked Dual-Band Circularly Polarized Antennas Keyword Proximity-Coupled Circular polarization antenna Circular polarization antenna Proximity-Coupled Abstract This thesis describes a single-fed dual-band circularly polarized antenna. The antenna contains two stacked patches and is proximity-coupled to the bottom patch by an open-ended microstripline. The top patch is a corner-truncated square patch.The bottom patch is a slits-loaded patch with an aim to reducing the size of the bottom antenna by tuning the length of the slits. The top antenna is mainly responsible for the radiation at 2.45GHz and the bottom antenna is mainly responsible for the radiation at 1.575GHz.
The measured return loss bandwidth in the lower band is 63MHz (4%) and the axial-ratio bandwidth is 10MHz (0.635%).The return loss bandwidth in the higher band is 161MHz(6.7%), and the axial-ratio bandwidth is 35MHz(1.43%). The antenna gain in lower band is above 3dBic, and the gain in the higher band is between 6 and 8dBic.
Advisor Committee The-Nan Chang - advisor
Files Date of Defense 2013-07-25 Date of Submission 2013-08-15